Tilting-chair iron



(No Model.)

M. A. HANSON & W. W. WOLPF. 'TILTING CHAIR IRON.

No. 599,502. Patented Feb. 22,1898.

ymoxo 8 3 J its MILES A. HANSON AND WVILLIAM W. VVOLFF, OF SI-IEBOYGAN,IVISCONSIN.

TlLTlNG CHAlR IRON.

SPECIFICATION forming part of Letters Patent No. 599,502, dated February22, 1898.

Application filed October 16,1897. Elerial No. 655,452. (No model.)

To ctZZ whom it may concern:

Be it known that we, MILES A. HANSON and WVILLIAM IV. l/VOLFF, ofSheboygan, in the county of Sheboygan and State of Wisconsin, haveinvented a new and useful Improvement in Tilting-Chair Irons, of whichthe following is a description, reference being had to the accompanyingdrawings, which are a part of this specification.

Ourinvention has relation to improvements in tilting-chair irons.

The primary object had in View is to provide an improved form of stopfor limiting the rearward tilting of the chair.

lVith the above primary object in View the invention consists of thedevices and parts, or their equivalents, as hereinafter more fully setforth.

In the accompanying drawings, Figure 1 is an inverted plan View of thecomplete iron. Fig. 2 is a central longitudinal section of Fig. 1. Fig.3 is a detail view, on a reduced scale, of that portion of the ironwhich is secured to the upper end of the spindle and forms thehead-piece thereof. Fig. 4 is a fragmentary sectional view of a modifiedform of construction, and Fig. 5 is a detail of Fig. 4.

Referring to the drawings, the numeral 6 indicates the spider-frame,which is provided with the usual arms 7, which extend in a horizontalplane and are secured at their ends to the under side of the chair-seat.The spider is also formed with the depending side arms 8 8. The rearedge of the central cross-piece of the spider is also cast with thedepending integral ears 9 9, said ears provided with therearwardly-projecting lugs 10 10, which lugs extend into the inner endsof coiled springs 11 11. A cross-bar 12 bears against the outer ends ofthese springs, and said cross-bar is provided with the inwardly-extending lugs 13 13, which extend into the coils of the springs.

The numeral 14: indicates a casting which forms the head-piece of thechair-spindle, (not shown,) said casting being provided with a centralopening 15, into which the upper end of the chairspindle passes. Thiscasting is arranged between the lower ends of the depending side arms 8of the spider and has projecting therefrom laterally trunnions 16 16,which extend into openings in the depending arms 8, and upon whichtrunnions said depending arms and the spider of which they form a partare adapted to turn. The casting 14 is also provided mediallywithupwardl'yextending arms 17 17, which arms are connected medially bya cross-arm 18 and are also connected near their lower ends by anothercross-bar 19, said bar 19 having preferably a beveled rear edge.

The numeral 20 indicates a rod which passes through the cross-bar 12 andbetween the springs 11 11 and is formed at its inner end with a hook 21.The under side of this hook is advisably arranged at a rearward incline,so as to conform to the beveled edge of the cross-bar 19. The outer endof this rod is threaded to receive a hand-wheel 22, which hand-wheel isadapted to be turned up against the cross-bar l2,and thereby regulatethe tension of the springs 11. In the form of device illustrated inFigs. 1, 2, and 3 of the drawings the hook 21 of the rod 20 is made toengage over the medial cross-bar 18.

In the operation of the invention when the chair is tilted rearwardlyafter it has reached a certain rearward slant the inclined under portionof the hook 21 will contact with the beveled rear edge of the lowercross-bar 19. This bar therefore forms an effective stop against furtherrearward tilting. The springs 11, of course, when the chair is thustilted rearwardly are compressed, so that when the occupant of the chairceases to exert force rearwardly the recoil of the springs 11 willassist in returning the chair to its forward position. The forwardturning of the chair is limited by contact of the upper ends of the arms17 17 with the rear edges of slots similar to 23, formed in theconnecting cross-bar of the spider.

In the modified form of construction illustrated in Figs. 4 and 5,instead of employing the cross-bar 18 shown in the other figures of thedrawings, which cross-bar was shown in said other figures as integralwith the arms 17 17, we provide a separate or removable cr0ss-bar2 1.This cross-bar is provided medially with a rearwardly-extending car 25,which ear is provided with an opening 26. The arms 17 17 are alsoprovided with sockets or recesses 27, which receive the ends of thecross-bar 24. The space between the arms 17 17 is sufficient toaccommodate the ear 25 of the cross-bar 24, and the side edges of saidears therefore form shoulders 28 28, which are adapted to bear againstthe inner sides of the arm 17, and thereby prevent the cross-bar fromworking out of place endwise or laterally. The inner hook 21 of the rod20 in this form of device, instead of engaging around the cross-bar 24,is passed through the opening 26 thereof, and the underrearwardly-inclined portion of the hook, in order to interfere as littleas possible with the turning of the hook when the chair is tiltedrearwardly, is reversely curved or curved rear- Wardly, as clearly shownand as indicated by the numeral 29.

\Vhat we claim as our invention is- 1. In tilting-chair irons, thecombination, of a spindle-head formed or provided with a cross-bar andwith a stop, a spider pivoted to the spindle-head, a coiled springbearing at its inner end against the spider, a rod provided with ahooked inner end engaging the cross-bar of the spindle-head, andadapted, when the chair is tilted rearwardly to a certain extent, tocontact with the stop, and a nut engaging the outer end of the rod, andadapted to regulate the tension of the spring.

2. In tilting-chair irons, the combination, of a spindle-head, formed orprovided with cross-bars, one of said cross-bars forming a stop, aspider pivoted to the spindle-head, a coiled spring bearing at its innerend against the spider, a rod provided with a hooked inner end engagingone of the cross-bars of the spindle-head, and adapted, when the chairis tilted rearwardly to a certain extent, to contact with the othercross-bar forming the stop, and a nut engaging the outer end of the rod,and adapted to regulate the tension of the spring. 7

3. In tilting-chair irons, the combination, of a spindle-head formed orprovided with a cross-bar and with a stop, a spider pivoted to thespindle-head, a coiled spring bearing at its inner end against thespider, a rod provided with a hooked inner end engaging the cross-bar,the under portion of said hook being inclined rearwardly, saidrearwardly-inclined portion adapted, when the chair is tilted rearwardlyto a certain extent, to contact with the stop, and a nut engaging theouter end of the rod, and adapted to regulate the tension of the spring.

4. In tilting-chair irons, the combination, of a spindle-head formed orprovided with cross-bars, one of said bars forming a stop saidrearWardly-inclined portion adapted,

when the chair is tilted rearwardly to a certain extent, to contact withthe rearwardlybeveled edge of the cross-bar forming the stop, and a nutengaging the outer end of the rod, and adapted to regulate the tensionof the spring.

5. In tilting-chair irons, the combination,

of a spindle-head formed or provided with upv wardly-extending arms andwith a stop, a cross-bar connecting the arms, a spider pivoted to thespindle-head, a coiled spring bearing at its inner end against thespider, a rod provided with ahooked inner end engaging the cross-bar,and adapted, when the chair is tilted rearwardly to a certain extent, tocontact with the stop, and a nut engaging the outer end of the rod.

6. In tilting-chair irons, the combination, of a spindle-head,fo1'med orprovided with upwardly-extending arms, cross-bars connecting said arms,one of said cross-bars forming a stop, a spider pivoted to thespindle-head, a coiled spring bearin g at its inner end against thespider, a rod provided with a hooked inner end engaging one of thecross-bars, and adapted, when the chair is tilted rearwardly to acertain extent, to contact with the other cross-bar forming the stop,and a nut engaging the outer end of the rod.

7. In tilting-chair irons, the combination, of a spindle-head formed orprovided with a cross-bar and with a stop, a spider pivoted to thespindle-head, coiled springs bearing at their inner ends against thespider, a crossbar bearing against the outer ends of the springs, a rodpassing through the cross-bar and provided with a hooked inner endengaging the cross-bar of the spindle-head, and adapted, when the chairis tilted rearwardly to a certain extent, to contact with the stop, anda nut engaging the outer end of the rod, and adapted to be turned upagainst the crossbar which bears against the outer ends of the springs.

8. In tilting-chair irons, the combination, of a spindle-head formed orprovided with a stop, a removable cross-bar fitted to said spindle-head,a spider pivoted to the spindlehead, a coiled spring hearing at itsinner end against the spider, a rod provided with a hooked inner endengaging the cross-bar of the spindle-head, and adapted, when the chairis tilted rearwardly to a certain extent, to contact with the stop, anda nut engaging the outer end of the rod.

9. In tilting-chair irons, the combination, of a spindle-head formed orprovided with a stop, a removable cross-bar fitted to said spindle-head,said bar having an opening therethrough, a coiled spring bearing at itsinner end against the spider, a rod provided with a hooked innerend,said hook passing through the opening of the cross-bar, and adapted,when the chair is tilted rearwardly to a certain extent, to contact withthe stop, and a nut engaging the outer end of the rod.

10. In tilting-chair irons, the combination, of a spindle-head formed orprovided with a stop, a removable cross-bar fitted to said spinacoiledspring bearing at itsinner end against the spider, a rod provided with ahooked inner end, said hook passing through the opening of thecross-bar, and its under side being reversely or rearwardly curved, andsaid hook adapted, when the chair is tilted rearwardly to a certainextent, to contact with the stop, and a nut engaging the outer end ofthe rod.

11. In tilting-chair irons, the combination, of a spindle-head, providedwith upwardlyextending arms and with a stop, and the edges of said armsprovided with sockets or recesses, a removable cross-bar fitting in saidsockets or recesses, a spider pivoted to the spindle head, a coiledspring bearing at its inner end against the spider, a rod provided witha hooked inner end engaging the removable cross-bar and adapted,when thechair is tilted rearwardly to a certain extent, to contact with thestop, and a nut engaging the outer end of the rod.

12. In tilting-chair irons, the combination, of a spindle-head havingupwardly-extending arms and provided with a stop, and the edges of saidarms provided with sockets or recesses, a removable cross-bar fitting insaid sockets, said bar provided with shoulders adapted to contact withthe inner sides of the upwardlyextending arms, and prevent the cross-barfrom Working out of place laterally, a spider pivoted to thespindle-head, a coiled spring bearing at its inner end against thespider, a rod provided with a hooked inner end, said hook engaging theremovable cross-bar, and adapted, when the chair is tilted rearwardly toa certain extent, to contact with the stop, and a nut engaging the outerend of the rod. 13. In tilting-chair irons, the combination, of aspindle-head having u pwardly-extending arms and provided with a stop,and the edges of said arms provided with sockets or recesses, aremovable cross-bar fitting in said sockets, said bar provided mediallywith a projecting ear having an opening therethrough, a spider pivotedto the spindle-head, a coiled spring hearing at its inner end againstthe spider, a rod provided With a hooked inner end, said hook engagingthe opening of the ear of the removable cross-bar, and adapted, when thechair is tilted rearwardly to a certain extent, to contact with thestop, and a nut engaging the outer end of the rod.

In testimony whereof We afiix our signatures in presence of twoWitnesses.

MILES A. HANSON. I/VILLIAM XV. WVOLFF. Witnesses to Miles A. Hansonssignature:

CHARLES E. SOHARLAU, Gno. A. MUGLER. l/Vitnesses to Wm. W. WVolffssignature:

WILLIAM LOEFFLER, M. A. Lone.

